Study: Low Serotonin Levels Linked to Dementia

Source: Johns Hopkins Medicine Summary: In a study looking at brain scans of people with mild loss of thought and memory ability, researchers report evidence of lower levels of the serotonin transporter — a natural brain chemical that regulates mood, sleep and appetite. A brain showing decreases of serotonin transporters (blue) in the whole mild […]

Are Friends Better for us than Family?

EAST LANSING, Mich. – The power of friendship gets stronger with age and may even be more important than family relationships, indicates new research by a Michigan State University scholar. In a pair of studies involving nearly 280,000 people, William Chopik found that friendships become increasingly important to one’s happiness and health across the lifespan. […]

Alzheimer’s begins before symptoms appear

Alzheimer’s disease begins destroying the brain years before mental deterioration is detected, a new study suggests. This finding means there could be twice the number of people with the neurodegenerative disease in the United States — and worldwide — as currently believed. Cognitively normal individuals who had elevated levels of a toxic brain protein called […]

Alzheimer’s disease likely not caused by low body mass index

A new large-scale genetic study found that low body mass index (BMI) is likely not a causal risk factor for Alzheimer’s disease, as earlier research had suggested, according to a study published in the Endocrine Society’s Journal of Clinical Endocrinology & Metabolism. “Although prior studies found an association between Alzheimer’s disease and low BMI, the […]